Alarm door-knob.



No. 666,652. Pa-tent'ed Nov. l2, |901.

F. J. GUSTINE;

ALARM DUUR KNOB.

(Application filed Mur. 9. 1901.) (No Model.) 2 Sheets- Sheet I.

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(No Model.)

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UNITED STATES PATENT OFFICE.

FRANKLIN JOHNS GUSTINE, OF NEW ORLEANS, LOUISIANA.

ALARM DOOR-KNOB,

SPECIFICATION forming part of Letters Patent No. 686,652, dated November 12, 1901.

Application tied March' 9, 1901.

T0 all whom, it may concern.' v

Be it known that I, FRANKLIN JOHNS GUS- TINE, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Alarm Door- Knobs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. j

My invention relates to improvements in alarm door-knobs, the object being to provide a door-knob which may be used withl any ordinary form of latch for opening and closing the door and which when properly set will 'sound an alarm on the inside of the door when turned by a person on the outside.

The invention consists of the mechanism hereinafter described and claimed.

Reference is had to the accompanying drawings, in which the same parts are designated by the same letters of reference throughout the several views, and in which- Figure 1 represents a section through the alarm-knob and door-plates, showing the outside knob in elevation, the section bein g taken on the line 1 l through Figs. 3 and 5. Fig. 2 represents a plan of the parts shown in Fig. 1. Fig. 3 represents an elevation of the alarmknob with the bellremoved and looking from the left-hand side in Fig. 1. Fig. 4t is a def tail View of the bell looking at the interior thereof. Fig. 5 represents an elevation of the rotating spring-drum removed from the knob and looking at the opposite side to that shown in Fig. 3. Fig. 6 is aview looking at the in terior of the bell-shaped casing which partly incloses the spring-drum on the side next to the door and which takes the place of the ordinary knob, and Fig. 7 is a section taken on the line 7 7 of Figs. 1 and 2 looking in the directionof the arrows and showing the door-plate in elevation.

A designates the door-plates, one of which is secured on each side of the door in the usual manner and which may be made rectangular, as shown, or may be round, as are sometimes used, the particular form of door-plate being immaterial. The door-plates A are perforated, as at a, for the shank B, which passes through them and through the door and lock Serial No. 50,493. (No model.)

in the usual manner. omitted in the drawings, as they form no part of this invention, and may be of any ordinary and well-known form.

The door and lock are The knob B on the outside of the door may,Vv`

be of the usual form and secured to the shank in any suitable manner. vEach of the doorplates is provided with a flange et around the perforation a, in one side of which flange is a slot or opening c2 for a purpose to be explained Y hereinafter.

The reduced portion B2 of the outside knob B enters the flange a in the usual manner. On the inner side of the door in place of the ordinary knob a bell-shaped casing C is secured rigidly to the shank B, and this casing is provided witha sleeve C, which extends toward the door and fits over the flange 0. on the door-plate A. The sleeve C' has a slot c2,

which registers with the slot a2 when the knob Y and shank are in their normal position.

The shank B is rectangular in cross-section where it passes through the door and lock and becomes round where it passes through the sleeve Cf'and casing C, as shown in Fig. l.V

A sleeve Dis fitted to rotate upon the rounded end b of the shank B, which projects beyond thecasing C, and on this sleeve is mounted to rotate a drum E, having a disk F secured to its outer side. From the outer side of the disk F project two or more pins f, upon which are loosely mounted the slotted buttons f',

held in place by washers f2 on the p ins f.

The bell .G is in the form of an ordinary gong with a central screw-threaded spindle g', which is screwed into a threaded opening in the end b of the shank B, as shown in Fig.

`l', and this bell when in place partly incloses the disk F. Now if this vdisk F be rapidly revolved the looselymounted buttons f thereon will be thrown outwardly and strike the interior of the bell G. The interior of the bell'Gis provided with a rib g', against which the buttons f strike and which serves to break the continuous rotation of these buttons,caus ing them to strike the bell several times in each revolution of the disk, thus producing a continuous ringing of the bell as long as the disk continues to revolve. A coiled spring I-I is housed within the drum E and secured atV one end to the drum and at the other end to the sleeve D.

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A perforated disk I is tted into and secured to the open side of the drum E to turn therewith, and this disk has secured thereto a smaller disk I', having a notch t' for the reception of a pawl J, the purpose of which will hereinafter appear. The sleeve D,projecting through the disk I, is provided with shoulders d, with which a spring-actuated pawl c in the casing C is adapted to engage. This pawl c will prevent the sleeve D from turning in one direction, but will allow it to turn in the other direction, as will be readily understood.

The pawl J is pivoted upon the shank B within the sleeve C', as at b', and extends through an opening c in the casing C, the outer end being held in engagement with the disk'l/ bya springj. The notch t' in the disk I is formed with one straight side i' and one inclined side i2, as shown in Fig. 5. This will allow the disk to be rotated in one direction, (the pawl J being raised by the inclined side but the said pawl will hold it from rotation in the opposite direction by bringing up against the straight side i of the notch 't'.

The pawl J extends toward the door-plate and has its rear end bent upward to form a rounded toe j, which normally projects into the slot a2 in the fiange a' of the door-plate A when the outer end of the pawl rests in the notch t'.

The drum E is provided with a ring e, by means of which it may be turned to wind the spring when necessary.

In operation the ordinary door-knob B is placed on the outside of the door and the alarm-knob on the inside. Vhen it is desired to set the alarm, the finger is placed in the ring e and the drum E is turned several times in the direction to wind up the spring H. During the winding up of the spring the pawl c will hold the sleeve D from rotation, thus causing the spring to wind. When the spring is sufficiently wound up, the pawl J, resting in the notch z', will hold the drum from turning in the direction to unwind the spring. -When the parts are in this position, the toe j will project into the slot a2 in the flange a', as shown in Figs. l, 2, and 7. Should the knob be turned, the pawl J will turn with the shank B, which movement will force the toe j down inside of the flange a', causing the outer end to rise out of the notch iin the disk I', thus releasing the drum E, which by reason of the tension of the spring H will rotate rapidly, carrying with it the disk F and causing the buttons f to strike the bell, and thus sound an alarm. As the pawl c will only hold the sleeve D from rotation in one directionthat is, while the spring is being woundthe momentum of the drum acquired while the spring is unwinding will cause the drum to turn several times after the spring is unwound, thus prolonging the sound of the alarm.

This door-knob is designed to be used on doors of hotel-rooms, bedrooms, and outside doors of private houses. In any case the occupants before retiring for the night would wind the alarm, after which should the knob be turned either in an attelnpt to break into the room or house or in an attempt to awaken the occupants the alarm would sound.

In an alarm-knob constructed as hereinbefore described the alarm would be sprung on the rst movement of the door-knob and before the knob had been turned far enough to unlatch the door.

Having thus described my invention, what I I claim, and desire to secure by Letters Patent of the United States, is

l. The combination with a door-knob and spindle, of a bell mounted on one end of said spindle, a spring operated rotatable disk mounted on said spindle, within said bell, buttons loosely mounted on said disk adapted to strike said bell, and means for releasing said disk when under tension, by turning the door-knob, substantially as described.

2. The combination with a door-knob and spindle, of a bell mounted on one end of said spindle, a spring-operated rotatable drum loosely mounted on said spindle, a disk fastened to said drum, buttons loosely mounted on said disk and located within said bell, and means for releasing said drum when under tension by turning the knob, substantially as described.

3. The combination with a door-knob and spindle, of a bell mounted on one end of said spindle, a casing mounted on said spindle, a spring operated rotatable drum mounted loosely on said spindle within said casing, means within said casing for holdingsaid drum against backward movement when being wound up, means secured to said drum within said bell for ringing the same, and means for releasing said drum when under tension by turning said door-knob, substantially as described.

4. In a door-alarm, the combination with a knob, a shank extending through the door, and a bell on the end of said shank; of a sleeve mounted to turn on said shank, a drum mounted to turn on said sleeve, means connected with said drum for ringing the bell, a spring connected with said sleeve and with said drum, means for holding said sleeve from rotation, means for holding said drum when the spring is wound up, and means for releasing said drum when the shank is turned; substantially as described.

5. In a door-alarm, the combination with a knob, a shank extending through the door, and a bell on the end of said shank; of a sleeve mounted to turn on said shank, a drum mounted to turn on said sleeve, a disk secured to said drum, buttons loosely mounted on said disk and adapted to strike said bell, a spring connected with said sleeve and with said drum, means for holding said sleeve'from rotation, means for holding said drum when the spring is wound up, and means for releasing said drum when the shank is turned; substantially as described.

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6. In a door-alarm, the combination with a knob, a shank extending through the door, and a bell on the end of said shank; of a sleeve mounted to turn on said shank, means for holding said sleeve from rotation in one direction, a drum mounted on said sleeve and adapted'to ring the bell, a spring connected with said drum and with said sleeve, a disk secured to said drum and having a notch there in, a pawl pivoted to said shank and adapted to engage said notch to hold the drum when the spring is wound up, and means for lifting said pawl out of said notch when the shank is turned; substantially as described.

7. In a door-alarm, the combination with a knob, a shank extending through the door, and a bell on the end of said shank; of a drum mounted to turn on saidl shank and adapted to ring the bell, a spring tending to turn said drum, a disk on said drum having a notch therein, a pawl adapted to engage said notch and means for withdrawing said pawl when the shank is turned; substantially as described.

8. In a door-alarm, the combination with a knob, a shank extending through the door, anda bell on the end of said shank of a drum mounted to turn on said shank, and adapted to ring the bell, a spring tending to turn said drum, a disk on said drum having a notch therein, a pawl pivoted on said shank and adapted to engage said notch, and means for withdrawing said pawl from said notch when the shank is turned; substantially as described.

9. In a door-alarm, the combination with a door-plate, a iiange on said door-plate having a slot therein, a shank extending through said door-plate, a knob on one end of said shank, and a bell on the other end of said shank; of a drum mounted to turn on said shank, and adapted to ring said bell, a spring tending to turn said drum, a pawl pivoted on said shank and adapted to hold said drum from turning, said pawl extending into the slot in the iiange of the door-plate when holding said drum; substantially as described.

10. In a door-alarm, the combination with a shank, a knob on one end of said shank, and

a bell on the other end of said shank; of a sleeve mounted to rotate on said shank and having shoulders on one end,a drum mounted to rotate on said sleeve and adapted to ring the bell, a spring secured at one end to the sleeve and at the other end to the drum, a casing secured to said shank and partly inclosing said drum and shank, a spring-actuated pawl in said casing adapted to engage the shoulders on said sleeve, a pawl pivoted to vthe shank and adapted to hold the drum when the spring is wound up, and means for disengaging said pawl from said drum when the shank is turned; substantially as described.

1l. In a door-alarm, the combination with a door-plate, a iiange on said door-plate having a slot therein,a shank extending through said door-plate, a knob, on one end of said shank,

and a bell on the other end of said shank; of a drum mounted to turn on said shank, and adapted to ring said bell, a spring tending to turn said drum, a casing on said shank partly inclosing said drum and shank, a pawl pivoted on said shank within said casing, one end of said pawl engaging said drum, a toe on the other end of said pawl extending into the slot in the ange on the door-plate, said pawl being adapted to hold said drum from rotation when the toe is in the slot, and to release said drum when the toe is withdrawn within said flange on the door-plate; substantially as described.

In testimony whereot` I affix my signature in presence of two witnesses.

FRANKLIN JOHNS GUSTINE.

Witnesses:

MAX. HUBERT, JOSEPH W. CARROLL. 

